White-eared Hummingbird cm; male c. 3·6 g, female c. 3·2 g. Male has straight bill, red, tipped black; forehead glittering violet, white. Hylocharis leucotis leucotis: Highland pine forests of central and s Mexico to Guatemala White-eared Hummingbird (Hylocharis leucotis) [version 1] American. Click here for more information about the Red List categories and criteria. Justification of Red List category. This species has a very large range, and hence does.

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Differences in the success rate of defense against intruders of different body sizes can be explained by 1 the size asymmetries among contenders and 2 detectability of intruders in relation to the size of the territory. Our results showed that the identity of the intruder and the size and quality of the territory determined the result of the contests, but not the intensity of defense.

The number of flowers in each of the 20 territories was counted around the time that each owner was observed. Territory area, flower density, and time budgeting in hummingbirds: Contribute There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages.

White-eared hummingbird

Temporal partitioning of a floral resource by territorial hummingbirds. Closely related to B. White-eared Hummingbird occupies montane pine-oak, oak, and pine-evergreen forests from the extreme southwestern United States south to Nicaragua.


White-eared hummingbird Basilinna leucotis Hyloharis status. Articles with ‘species’ microformats. However, the smallest ones were more likely to be excluded from smaller rather than from larger territories.

It is red in coloration, and shows a black tip. Year-round Migration Breeding Non-Breeding. Only members are able to post public comments.

Territoriality among male red-winged blackbirds: Common and widespread throughout much of range. Habitat preference increases territorial defence in brown trout Salmo trutta Behavioral Ecology and Sociobiology. Furthermore, it hylocyaris individual monitoring during several months without affecting their flight or behavior Kapoor, Thus, asymmetries in body size among contenders, but not territory value, affected the probability of an owner chasing an intruder.

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His throat is a metallic turquoise green. If the cost of defending the territory exceeds its value, the resident must eventually leave Smith, None of these birds were found dead or missing during the study. The resident hummingbird behavior was observed and recorded from Journal List PeerJ v. Of these we recorded 55 chase events with conspecific intruders and 32 heterospecific ones. In each observation period, we recorded the number and species of intruders and the frequency of chases against them.

Caught individuals were identified, sexed, weighed, and measured. The obtained models showed that intruder type is the best predictor of whether an intruder is chased or not Table 1while the evaluated characteristics of the defended territory had no significant effect Table 1.


Each marked individual had a color combination exclusively for its posterior identification. Influence of asymmetries in resource quality and age on aggression and dominance in black-chinned hummingbirds. Testing hypotheses of territorial dominance. Territory nylocharis and size The number of flowers in each of the 20 territories was counted around the time that each owner was observed.

Thus, asymmetries in resident-intruder traits related to fighting ability i. The average area and number of flowers within the territories were The undertail coverts are predominantly white.

Hylocharis leucotis (White-eared Hummingbird) – Avibase

The identity of the intruder was not enough to expel the owners from their territories. Evolution of fighting behavior: Our results showed that flexibility observed in contest tactics suggests that these tactics are not fixed but are socially plastic instead and they can be adjusted to specific circumstances. Our study provides additional information about a mechanism not leucotus evaluated in the Trochilidae, which deserves to be analyzed under controlled conditions.

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